Missy Franklin swam two preliminary heats in 30 minutes and advanced to the top final of the 100m backstroke at the Pan Pacific Championships on Thursday morning, two days after being helped off the pool deck with back spasms in Gold Coast, Australia.

“There’s definitely some discomfort still, but it’s getting much, much better day by day,” Franklin said after her swims, according to Swimming World.

The four-time Olympic champion decided after warm-ups that she would swim her first event, the 200m freestyle, evaluate her back and then decide if she would swim the 100m backstroke. She’s the reigning World champion in both events.

“I think we were definitely going to see how warm-up went this morning, and after this morning I really felt like I could tough it out and do both,” Franklin said, according to Swimming World. “I’m really happy that I did that. Definitely not the easiest day.”

Franklin clocked 1 minute, 57.63 seconds to finish second in her 200m free heat. She was the third-fastest American overall, and only the top two advanced to Thursday night’s A final. Franklin said she will will swim in the B final (5 a.m. ET).

She returned for the 100m back and finished second in her heat again at 1:00.60, behind Australian Belinda Hocking (1:00.45). She was the fastest American overall, earning a spot in the A final.

“Regardless of what happens I want to know that I went out there and I fought for it,” Franklin said, according to Swimming World. “If I do that, then I’ll be able to sleep regardless of the time.”

World Swimmer of the Year Katie Ledecky (1:56.45) and Shannon Vreeland (1:57.40) were the U.S. swimmers who made the A final of the 200m free. They’ll face Australians Melanie Schlanger (1:57.16) and Bronte Barratt (1:57.65) in the night session.

In other events, Conor Dwyer and Ryan Lochte advanced to the men’s 200m free final. Michael Phelps scratched both the 200m free and the 100m back Thursday and is set to make his debut at the meet Friday.

Olympic champion Matt Grevers led the qualifiers into the men’s 100m back final, followed by American Ryan Murphy and Japanese Olympic bronze medalist Ryosuke Irie.

Olympic 200m back champion Tyler Clary and Chase Kaliszqualified for the A final of the 200m butterfly after Tom Shields was disqualified.

Katie McLaughlin and 2012 Olympian Cammile Adams were the U.S. qualifiers into the top women’s 200m butterfly final.